Table 4.
Nuclide
55
Fe
63.
Ni
90
SY
151
238
Nuclides measured in wet-chemistry analyses.
Half-life
Principal radiation
Type of detection
.
,
Gamma counting: Nal(Ti),
Ge(Li) detectors.
(2.7 y
5,95-keV x ray
92 ¥
B particle
(E
= 65.9 keV)
max
Liquid scintillation counter.
.
90
§ particle of
Y
daughter
(E
= 2,27 MeV)
max
.
.
Beta counting:
gas-filled
proportional counter.
.
B particle
(£
= 76 keV)
max
.
eer
.
Liquid scintillation counter.
28.5 y
sm
B87 y
Pu
87.8 y
,
5.50~MeV a
Ce
a
ea
ge
.
;
Alpha-pulse-height analysis
(Frisch-grid chamber, solid
state).
239
240
241
241
Pu
24,400 y
5.16-MeV a
Mass spectrometry, alphapulse-height analysis.
Pu
6,540 y
5.17-MeV o
Mass spectrometry, alpha pulse
height analysis.
§8 particle
(E
= 21 kev)
max
Mass spectrometry.
Pu
Am
Fe, Ca, Sr
14.0 y
433 y
Stable
5.49-MeV a
.
.
Alpha-pulse-height analysis.
None
(Atomic absorption).